Clinton’s collapse adds fuel to questions on her fitness to lead

Hillary Clinton suffered some sort of medical episode Sunday while attending a ceremony in New York marking the Sept. 11, 2001, terrorist attacks. It was sufficiently serious that aides and secret-service agents had to hold her upright, save her from falling and bodily lift her into an armoured van while attempting to keep her out of view.

While Ms. Clinton, the Democratic nominee for president, later tried to brush off her near-collapse as nothing more than feeling a little “overheated,” it raised new, serious concerns about her neurological health and her fitness – at the age of 68 – to serve a four-year presidential term.

Long-dogged by doubts about her health, Ms. Clinton shifts between insisting she is fit, vigorous and fully capable of coping with the stresses of being commander-in-chief and citing brain injury as an excuse for failing to remember crucial briefings about handling classified e-mails...